Any suggestions on wattage and distance for Mars Hydro sp250. Having problem with lights burn intensity
The best way to dial in lights IMO (aside from using a light meter) is to start way above what you think will be a good height and lower it slowly over time until you see the plants show signs of stress, then back off a bit.
I'm with scoobie, that's what I do. Root them up under a seedling light then start main light at 3ft once they're a couple nodes tall. Lower a couple inches every couple days till they stress then back off a bit. Measure that distance and hold till bloom.
I'm at around 15 inches with a mars ts600, was at 12 inches and its burned it. Was just coming into flower when I got the light. Hoping its ok at 15, cant get much higher.